Our key tasks

We are primarily tasked with providing power transmission services, system services and facilitating the energy market. Our core tasks follow from our appointment as grid operator under the Dutch 'Elektriciteitswet' (E-wet) and the German 'Energiewirtschaftsgesetz' (EnWG).

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TenneT presents Hub and Spoke concept for large scale wind energy on the North Sea.

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Our grid

TenneT manages the high-voltage grid in the Netherlands and large parts of Germany. TenneT transmits electricity at 110,000 volts (110 kV) and higher. With around 23,500 kilometres of high-voltage lines, we cross borders and connect countries.

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Offshore Outlook 2050

Already by 2030, the originally planned capacity of 15 gigawatts of offshore wind energy will increase to 20 GW.

To Offshore Outlook 2050
Electricity market

The energy sector is developing rapidly. The process of European market integration began some years ago. Its purpose is to create a single European market that enables market parties to trade gas and electricity across national borders easily and efficiently.

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Transparency data

We provide transparency data on our operations on our Dutch and German transparency page and on ENTSO-E. 

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Our vision is to be one of the most transparent Transmission System Operators (TSO) in Europe and thereby creating value for society. In this Energy Insights section we present selected energy related topics and show data, information and valuable insights. 



Facts & figures related to TenneT facilitating the market can be found here.

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TenneT is a leading European electricity transmission system operator (TSO), with activities in the Netherlands and in Germany. We strive to ensure a reliable and uninterrupted supply of electricity in our high-voltage grid for some 42 million people.

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We are TenneT

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Balancing power

The transmission grid operators require balancing power as a prerequisite for maintaining the balance between generation and consumption.

The requirement for the three types of balancing power, i.e. primary balancing power, secondary balancing power, as well as tertiary control reserve power is procured in accordance with § 22 EnWG in an open, transparent RFP process that is free of discrimination using a common Internet platform (www.regelleistung.net)

There, you will find all information and data publications in connection with the joint procurement and commissioning of balancing power.Additional information and contact persons from TenneT TSO GmbH can be found under Tendering for Balancing Power. Information on the actually accessed balancing power can be found in the following.

Primary balancing power

In the event of a power imbalance within the entire UCTE network system, the primary balancing power is enabled automatically according to standardised criteria. Consequently, there is no information on the primary balancing power actually accessed by TenneT TSO GmbH.

Secondary balancing power

The secondary balancing power for a control area is requested by automatic access by the transmission grid operator that is affected. The amount of secondary balancing power accessed by TenneT TSO GmbH is shown under the actually accessed secondary balancing power.

Tertiary control reserve

The tertiary control reserve is requested by telephone and based on a timetable by the affected transmission grid operator. The amount of tertiary control reserve accessed by TenneT TSO GmbH is shown under the actually accessed tertiary control.

More information

Actually accessed secondary balancing power until 2010/12/31

Actually accessed secondary balancing power since 2011/01/01

Actually accessed tertiary control reserve until 2010/12/31

Actually accessed tertiary control reserve from 2011/01/01

Tender of balancing power